Operating manual - English Unocode 399 PLUS
Copyright S ilca 2010 67
7.5 CHECKING AND/OR REPLACING FUSES
Fuses should be checke d with a tester ( ohmmeter,
multimeter, etc.) as they may appear to be in good condition
even when they are elec trically faulty. Fuses must always
be replaced with the same amper age and type (rapid or
delayed), as indicated in this manual.
There are 6 fuses in the
UNOCODE 399 PLUS.
• 2 fuses: 4 Amps rapid (230V)
located next to the power socket on the back of the
machine, next to the main switch
(f ig. 4 8).
These fuses
protect the machine from power surges and/or spikes in the
electricity supply.
To check and/or replace the fuses proceed as follows
:
1) turn the machine off and unplug it from its power supply
cable.
2) use a flat screwdriver to open the flap covering the
socket, remove and check the fuses, replacing them if
necessary.
Fig. 48
• 4 fuses: F1, F2, F3 e F4
F1: 10 Amps delayed
-
protects the cutter motor and its electronic controls
(230V a.c.)
F2: 6,3 Amps delayed
-
protects the step motors and their electronic controls
(+32V d.c.)
F3: 4 Amps delayed
-
protects the logic control circuits on the microprocessor board
(+5V d.c.)
F4: 2 Amps delayed
-
protects the digital output circuits for the low voltage controls and the sensor inlets
(+24V d.c.)
Situated on the electronic circuit board inside the base of the machine
(fig. 49),
protecting the board from
short circuits.
To check and/or replace the fuses proceed as follows
:
1) turn the machine off and unplug it from its power supply cable.
2) remove the bottom panel (chap., page 70).
3) check and, if necessary, replace the fuses in the way described below:
to remove the fuse
:
- press the fuse cap with your fingers and turn it counter clockwise.
To fit the new fuse
:
- carefully position the fuse back in to place, then gently press the fuse cap downwards turning it clock-
wise.
Fig. 49
F1
10A
F4
2A
6.3A
F3
4A
F2
F4
F3
F1
F2
to open
to close
electronic circuit board
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